Imogen Anthony fires back at Em Rusciano over Kyle Sandilands jab

Imogen Anthony has unleashed on Em Rusciano in response to her open letter to Kyle Sandilands this week.

ICYMI, 38-year-old Rusciano shared some harsh words directed at the controversial KIIS FM host after he labelled her 2DAY FM radio show ratings "humiliating" and "terrible" on Tuesday morning.

"I don’t feel humiliated or pathetic in any way shape or form," Rusciano wrote in a letter shared on Instagram. "The radio ratings will come, and the fact that you keep mentioning me on your show proves that you know it too."

But since Kyle doesn't have social media, 26-year-old Anthony, who is dating Sandilands, took it into her own hands to "stick up" for her man.

"Seems to me you feel the need to say something to reinstate some form of 'power' here, but let's not get this twisted," Anthony began. "You're saying things because well actually - 2DAY FM have had the most embarrassing and lowest ratings SINCE the whole turn over."

She added, "Who's feeding you the bullshit?"

This week's results revealed Rusciano's show suffered its lowest result since she took over the reins from Rove McManus and Sam Frost in January. While Kyle and Jackie O retained an impressive 11.1 per cent share of the market.

Despite 2Day FM's low ratings, Rusciano pointed out that her radio show has "twice the engagement levels online than yours does."

Which Anthony addressed in her post with a simple, "Online engagement, pff."

"Kyle barely knows who you are, he spoke about the ratings on the station in general. Not you fool," she continued. "But hey, even Ray Hadley said that whoever is commandeering that entire station needs the f----n sack."

She went on to gush over her 46-year-old boyfriend's career trajectory.

"My man panels everything himself and has been in this industry for over 20 years, radio AND television," she wrote. "F--- your national show and your audio book babe. That scrapes the bottom barrel of what Kyle has done."

She signed off abruptly, but not before sharing some of her own troubles: "I have pms and can't deal with this loser s---."